The Joys of Playing together

[snuffles]

This is what i love about this sight...

post a thread and watch the fight begin, that has to be the best fun I have had in ages.....

Will be taking a photo of the offending headlights this evening and then we will do a poll on who thinks theyre to damn bright.

suppose it depends on if your looking through bacon coloured glasses or not!

[Sniper]

I thought this had something to do with sexual acts. Dammit!

[Colapop]

Me three (and I behave like it)

Wot he said.

[MidnightMike]

Now this is going to be the post to watch :eek5:

[Colapop]

You could watch the other one in PD!

[Grahameeboy]

Me three (and I behave like it)

Wot he said.

Poos....................

[ManDownUnder]

Is it me, or are these threads are putting m... :sleep:

[enigma51]

Now this is going to be the post to watch :eek5:
:corn: :corn:

[Motu]

Why don't you take it down to the testing station and put it on the beam setter - then take a photo of the lux reading....then you won't have to ask opinions,you will know if they are too bright.

Anyway....weren't they spots????

[James Deuce]

Even though I stuck up for him in that "other thread", those frikkin spots are like laser beams if he's following you. GLance in mirror, scream, "OMG, WTF, MY EYES, MY EYES, I'M BLIIIIIND".

It hurtses. But you can definitely see him while you still have your sight.

[Grahameeboy]

Even though I stuck up for him in that "other thread", those frikkin spots are like laser beams if he's following you. GLance in mirror, scream, "OMG, WTF, MY EYES, MY EYES, I'M BLIIIIIND".

It hurtses. But you can definitely see him while you still have your sight.

Is that the latest LTSA eye test you have written in BOLD Jim lad??

[James Deuce]

It's a special chart for the "lucky" recipients of Snuffles' spots. (All entendres intentional.)

[Grahameeboy]

It's a special chart for the "lucky" recipients of Snuffles' spots. (All entendres intentional.)

God I miss u Jim.....may call tonight.....aarrrrrrrrrrrrrrhhhhhhhhh

[Ixion]

Why don't you take it down to the testing station and put it on the beam setter - then take a photo of the lux reading....then you won't have to ask opinions,you will know if they are too bright.

Anyway....weren't they spots????

What is the maximum permitted lux reading ? The VIR manual does not specify anything - just says they must illuminate the ground 50mtr ahead and must not be "too bright causing significant dazzle to other road users, eg due to an incorrect light source,"

[Motu]

On my Hella Beam Setter - one lux = 625 cd....um,what's a cd ????

We set beams on low beam,as it's easier and the rate of dip is the important thing,if dip is set correctly then high beam is also correct.But I sometimes use the lux meter for high beam,the beam should be central and you can see the lux go ''over centre'' and set to the highest point.So actualy just a photo of his dip setting would be enough,and a better visual clue for us than a silly lux figure -I was just getting techo y'know....hit em with science.

[HDTboy]

We could just decide whether they're foglights, spotlights or headlights, then we'd know where to look in the virm

[Colapop]

I still got no idea what this thread's about???

[Hitcher]

Cd = candela, the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 × 1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian.

The frequency chosen is that to which the eye is most sensitive. This frequency is normally referred to as the corresponding wavelength: 555 nanometre. The wavelength varies with the medium through which the light passes, so, in the interest of precision, our relatively familiar wavelength description of light is not used in the standard.

The strange choice of the number 683 is to make the value identical to that obtained with the previous version of the unit: the emission from 1 square centimetre of glowing, solidifying platinum.

The steradian is the cone of light spreading out from the source which would illuminate one square metre of the inner surface of a sphere of 1 m radius around the source.

The light intensity coming towards the observer is assumed to be reaching all angles within the enclosing steradian at the same intensity. It doesn't have to in practice: one can perfectly well measure the luminous intensity from a lighthouse beam, knowing that it actually only covers less than a hundredth of a steradian. One measures the light received by a small sensor of known area and multiplies this to give the corresponding value for one steradian.

[Bonez]

I still got no idea what this thread's about???
Just someone wanting to be in the spotlight as it were.

Move right along folks! Nothing to be seen here.................

[Finn]

Cd = candela, the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 × 1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian.

The frequency chosen is that to which the eye is most sensitive. This frequency is normally referred to as the corresponding wavelength: 555 nanometre. The wavelength varies with the medium through which the light passes, so, in the interest of precision, our relatively familiar wavelength description of light is not used in the standard.

The strange choice of the number 683 is to make the value identical to that obtained with the previous version of the unit: the emission from 1 square centimetre of glowing, solidifying platinum.

The steradian is the cone of light spreading out from the source which would illuminate one square metre of the inner surface of a sphere of 1 m radius around the source.

The light intensity coming towards the observer is assumed to be reaching all angles within the enclosing steradian at the same intensity. It doesn't have to in practice: one can perfectly well measure the luminous intensity from a lighthouse beam, knowing that it actually only covers less than a hundredth of a steradian. One measures the light received by a small sensor of known area and multiplies this to give the corresponding value for one steradian.

Mate, could you be a little more precise please?

[Colapop]

Wots a lumen then?

[Hitcher]

The lumen is the unit of luminous flux. The flux from a light source is equal to the intensity in candela multiplied by the solid angle over which the light is emitted, taking account of the varying intensity in different directions.

[Colapop]

How then does various opacities affect lumenescience? Such as various films over windscreens or tinted lens covers?

[Hitcher]

Luminescence is the emission of light by a substance caused by physical or chemical means. Tinted films have no effect on luminescence, merely filtering various parts of the spectrum and so diminishing or filtering the light that passes through.

[Colapop]

So is/was opacity the right term for this then? Or would it be refraction that applies in the case of tints?

[Hitcher]

Opacity is a much better term. And if you're talking about tints, then refraction (bending of light) isn't what's happening. They filter light, removing parts of the spectrum, such as certain visible colours or ultraviolet.

[Colapop]

Opacity affects brightness and refraction affects visual spectrum. Does then radience come under the brightness umbrella? I'll come back for this tomorrow....

[Motu]

His lights actualy can't be too bright - 100W bulbs are illegal,and even they are not much brighter on the lux meter,practicaly not noticable...although I have never tested HID yet.They can only be out of adjustment,which is why it's pointless him taking a photo - how bright the light appears will depend on where the camera is...duh.The beam tester is the only way to see if they are in adjustment.

[HDTboy]

HID lights aren't that much brighter on the beam setter, they emit a different colour light though Motu, I'll check one tomorrow for you and let you know the numbers.
The best thing about factory HID lights is that they are self adjusting (have to be under German law) so when you've got 500Kg of cement in the boot of your M3, you still don't blind oncoming drivers at night.

[Ixion]

I still got no idea what this thread's about???

Nor have I, but that's never stopped me in the past !

[Bonez]

His lights actualy can't be too bright - 100W bulbs are illegal,and even they are not much brighter on the lux meter, Wondered why the testing station guys keeps asking the question "Can you can drive with this at night?" every time I take a m/c in for a WOF.

[Motu]

HID lights aren't that much brighter on the beam setter, they emit a different colour light though Motu, I'll check one tomorrow for you and let you know the numbers.
The best thing about factory HID lights is that they are self adjusting (have to be under German law) so when you've got 500Kg of cement in the boot of your M3, you still don't blind oncoming drivers at night.

Had one in last week,when you turned the lights on they went into a setting cycle,I didn't notice if they were HID,but they were no brighter than standard bulbs.

[HDTboy]

On dipped beam they're no brighter than halogens. On full beam they're off the scale (Hella beam setter)

Later model BMWs will do a learning cycle on startup (even halogens) so that the lights module has defined end stops for the adjusters so they don't need potentiometers.

HID lights will have an igniter box behind the headlight with a fat juicy cable running into the outer lamp. The inner lamp is a standard halogen bulb